Convective heater



FIG. 1 is a front, top, and right side perspective view of a convective heater showing my new design;

FIG. 2 is a right side elevational view thereof, the left side being a mirror image of that shown;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view of a convective heater showing a second embodiment of my new design;

FIG. 5 is a front elevational view of the top panel grill of a third embodiment of my new design, shown separately for clarity of illustration; and,

FIG. 6 is a front elevational view of the top panel grill of a fourth embodiment of my new design, shown separately for clarity of illustration.

The sole difference between the second, third and fourth embodiments from the first embodiment resides in the top panel grill.

The bottom of the design is plain and unornamented. 

The ornamental design for a convective heater, as shown and described. 